Bilstein B1 12-251407 / BILSTEIN-12-251407 Front Strut Top Mount & Bearing (Top Hat/Strut Tower/Front Shock Mount) for BMW X3 F25 2010-2017, X4 F26 2013-2018 – Front Axle OE Replacement Upper Support/Bearing Plate

Bilstein 12-251407 Upper Strut Bearing Plate for BMW X3 F25 and X4 F26

Restore sharp steering and a quiet, composed ride with the Bilstein B1 upper mount and bearing assembly, part number 12-251407 (BILSTEIN-12-251407). This genuine Bilstein service component is a front-end replacement for BMW X3 F25 2010-2017 and BMW X4 F26 2013-2018, delivering factory-level fit, long-term durability and the confidence of OE-grade materials.

If your front end has started to creak, clunk or feel vague, a tired top bearing plate is often the culprit. Swapping to this Bilstein unit helps eliminate unwanted noise, tightens up turn-in and lets your dampers do their job properly. It is the ideal solution for a chassis refresh, whether you run standard suspension or Bilstein shock absorbers.

Why this Bilstein mount is a smart upgrade

• Engineered by Bilstein for precise location and smooth strut rotation
• OE-quality construction for excellent service life and consistent performance
• Helps cure front-end knocks and restores steering accuracy and refinement
• Direct-fit front mounting plate - no modifications required on listed models
• Perfect partner for Bilstein dampers and a reliable factory-equivalent replacement on standard setups

Fitment and model years

BMW X Series

• X3 F25 09.2010 - 08.2017
  • sDrive 20i, xDrive 20i, sDrive 28i, xDrive 28i, xDrive 35i, sDrive 18d, xDrive 20d, xDrive 28d, xDrive 30d, xDrive 35d
• X4 F26 05.2013 - 03.2018
  • xDrive 20i, xDrive 28i, xDrive 35i, M40i, xDrive 20d, xDrive 30d, xDrive 35d

Our workshop experience

We have installed these Bilstein B1 upper supports on customer F25 and F26 vehicles with excellent results. Feedback is consistently positive - smoother steering action, reduced NVH and a more composed front end once worn mounts are replaced. It is a simple, high-impact fix for ageing suspension.

Helpful tips

• Replace in pairs for even wear and best handling balance
• Have a four-wheel alignment checked after suspension work
• Suitable as a direct service part replacement or when fitting new dampers and springs

Professional fitting

Prefer us to fit it for you? MJ Modifications in Warwickshire offers installation. Request a quote at info@mjmodifications.co.uk.

Compatibility check

We verify compatibility before dispatch. Provide your UK registration or the last 7 digits of your VIN at checkout for a fitment check.

Part identifiers

• Part number: 12-251407 / BILSTEIN-12-251407
• Brand: Bilstein
• EAN: 4025258763725
• UPC: 651860767062

Search terms customers use

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